Reinforced lock mounting

ABSTRACT

A reinforced lock mounting for a sheet metal door which can be set to accommodate locks of several different backset dimensions and which will prevent excessive movement of the latch bolt of any lock in any direction.

United States Patent Robert L. Yeager Orwell;

Arthur S. Brown, Girard, both of Ohio 45,712

June 12, 1970 Jan. 1 l, 1972 The American Welding & ManufacturingCompany Warren, Ohio [72] Inventors [21 Appl. No. [22] Filed [45]Patented [73] Assignee 54] REINFORCED LOCK MOUNTING 1 Claim, 3 DrawingFigs.

[52] US. Cl 0. 49/503, 70/451 [51] Int. Cl E06b 3/00 [50] Field ofSearch 49/503; 52/619, 620; 292/337; 70/45! [5 6] References CitedUNITED STATES PATENTS 2,004,510 6/1935 Schlage i. 70/451 3,389,5876/1968 Russell et al 70/451 3,455,078 7/1969 Brown et al 52/620 PrimaryExaminer- Kenneth Downey Attorney-Watts, Hoffmann, Fisher & HeinkeABSTRACT: A reinforced lock mounting for a sheet metal door which can beset to accommodate locks of several different backset dimensions andwhichwill prevent excessive movement of the latch bolt otany lock in anydirection.

BACKGROUND OF THE INVENTION Lock mountings for sheet metal doors havebeen provided heretofore but they were not entirely satisfactory for thereasons that the mountings did not prevent excess movement of the latchbolt in all directions in the door and could not be adjusted toaccommodate locks having different backset dimensions.

THE PRIOR ART The prior art most nearly pertinent to the presentinvention and known to us is US. Pat. No. 3,455,078. Schlage US. Pat.Nos. Re. 21,024 and 21,025 show lock mountings similar in certainrespects to the reinforced mountings of this invention.

SUMMARY The present invention provides a lock mounting in which areinforcement may be placed in any one of several positions toaccommodate locks having various backset dimensions. The reinforcementcan be rigidly fixed in one position in the door and is capable ofpreventing excess motion of the latch bolt in any direction in the door.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention will be betterunderstood from the following specification and the accompanyingdrawings in which:

FIG. 1 is a perspective view of a sheet metal door with parts brokenaway to show one form of the reinforced lock mounting of the presentinvention:

FIG. 2 is a horizontal, fragmentary, sectional view, partly in plan,taken on line 2-2 of FIG. I; and

FIG. 3 is an exploded, perspective view of the lock mounting andreinforcement also showing the latter in assembled view in phantom withthe former.

FIGS. 1 and 2 show a sheet metal door A composed of front and rearsheets 1 and 3. The longitudinal edges of the sheets 1 and 3 haveopposed flanges 5 and 7 which are welded together, as by projectionwelding, after the manner shown in US. Pat. No. 3,455,078. The door A ispreferably constructed in other respects substantially as shown in FIG.2 of that patent.

The flanges 5 and 7 on one edge of the door are cut away to form a spaceto receive a projecting portion of the reinforced lock mountingindicated as an entirety in FIG. 3. This reinforced mounting is securedin position between and in contact with sheets 1 and 3 and in theindicated relation to the space in the flanges 5 and 7 by welding, forexample, projection weldmg.

FIG. 2 also shows the assembly with door sheets 1 and 3 of the latchbolt actuating unit 8 and associated knobs 9, latch bolts 10, lockmounting 11 and lock mounting reinforcement 12.

Lock mounting II is quite like mounting 19 of US. Pat. No. 3,455,078, isgenerally U-shaped and includes a body 13 having a latch bolt-receivingopening 15 and substantially parallel legs 17 extending therefrom. Thebody portion 13 is sized substantially to fill the space providedtherefor in the flanges 5 and 7 of the door and extends diverginglyinwardly, as at 18, to clear the inner sides of those flanges.Projection welding points 19 on the opposite edges of the body 11 aresoftened during the welding operation and thus serve to connect the lockmounting 11 to the front and rear sheets 1 and 3 of the door.

As is shown in FIGS. 2 and 3, legs 17 of lock mounting II are providedwith pairs of notches 21a, 21b and 21c in one edge of the legs, theother edges 23 being free from notches.

The reinforcing member 12 of FIG. 3 is generally L-shaped and includes abody 27 having a latch bolt-receiving hole 29 therethrough andprojections 31 extending outwardly at opposite ed es thereof to seat inany one of the several pairs of notches a, 21b and 210 of lock mountingII. The reinforcement 12 also includes flanges 33 which extend atsubstantially right angles to the body 27 and are spaced apart toprovide a space 35 for latch bolt actuating unit 8. Notches 34 in body27 of member 12 are provided to act as bend reliefs when the flanges 33are bent at substantially right angles to body 27. The body 27 has sideedges 37 and the flanges 33 have side edges 39. The edge 37 of body 27and 39 of flanges 33 will bear against the inner surfaces of legs 17when member I2 is positioned in lock mounting 11.

It will be understood that the reinforcing member 12 will be positionedwith projections 31 in the pair of notches in lock mounting 11 whichwill accord with the backset dimensions of the particular lock which isto be mounted in the door. For example, when the projections 31 are inthe pairs of notches 210 or 21b or 210, locks having backsets of 2%inches, 3% inches and 5 inches, respectively, can be assembled in themounting and reinforcement. A

When the reinforcing member 12 is in position in the lock mounting 11with the projections 31 in the pair of notches appropriate for the lockto be assembled therewith, and the mounting is secured in the positionin the door indicated in FIGS. 1 and 2, the notched edges of the legs ofthe mounting will bear against door sheet 1 while the other edges 23 ofthe legs of the mounting will bear against the inner surface of theother door sheet 3. At the same time, the outer side surfaces of flanges33 of the reinforcing member 12 will bear against the inner surface ofdoor sheet 3. The flanges 33 are secured to door sheet 3, preferably bewelding, as indicated at 41.

When the mounting member 11 is secured to the door sheets, as bewelding, and the reinforcement 12 is secured to one of those sheets, asby welding, the assembly of the sheets, the mounting member and thereinforcement will constitute a rigid structure in which a lock bolt canbe mounted against excessive movement in any direction.

Having thus described this invention in such full, clear, concise andexact terms as to enable any person skilled in the art to which itpertains to make and use the same, and having set forth the best modecontemplated of carrying out this invention, we state that the subjectmatter which we regard as being our invention is particularly pointedout and distinctly claimed in what is claimed, it being understood thatequivalents or modifications of, or substitutions for, parts of theabove specifically described embodiment of the invention may be madewithout departing from the scope of the invention as set forth in whatis claimed.

1. A hollow sheet metal door comprising front and rear sheets havingopposed flanges along at least one edge of the door and connectedtogether by welding, said flanges being cut away to form a space for alock mounting, a generally U- shaped lock mounting member between saidsheets and projecting into said space, said member having a body andopposed legs extending therefrom, said body having a latch boltreceivinghole and said legs having pairs of notches in opposed edges thereof,said member having projection welding projections engaging with theinner surfaces of said sheets, a generally L-shaped reinforcing membercomprising a body and flanges extending from one edge of said body, saidbody having a latch bolt-receiving hole and having edges to engage theinner surfaces of said legs of the mounting member and projections toseat selectively in an opposed pair of said notches on said .legs, thelatch bolt-receiving holes in the mounting member and in the reinforcingmember being alignable and the flanges of the L-shaped member beingspaced apart to provide a space for a latch bolt actuating unit.

it i I

1. A hollow sheet metal door comprising front and rear sheets havingopposed flanges along at least one edge of the door and connectedtogether by welding, said flanges being cut away to form a space for alock mounting, a generally U-shaped lock mounting member between saidsheets and projecting into said space, said member having a body andopposed legs extending therefrom, said body having a latchbolt-receiving hole and said legs having pairs of notches in opposededges thereof, said member having projection welding projectionsengaging with the inner surfaces of said sheets, a generally L-shapedreinforcing member comprising a body and flanges extending from one edgeof said body, said body having a latch bolt-receiving hole and havingedges to engage the inner surfaces of said legs of the mounting memberand projections to seat selectively in an opposed pair of said notcheson said legs, the latch bolt-receiving holes in the mounting member andin the reinforcing member being alignable and the flanges of theL-shaped member being spaced apart to provide a space for a latch boltactuating unit.